Construction workers in Victoria will face random drug and alcohol testing on taxpayer-funded building sites after the state government revived the workplace issue.

Premier Denis Napthine says any company bidding for a government contract will need to have a comprehensive drug and alcohol testing plan in place by the middle of the year.

He's told News Corp Australia companies will also need to promise increased security on building sites to reduce fraud and theft.

"Reports of illicit drug use and distribution on Victorian construction sites are widespread," Dr Napthine says.

"The presence of intoxicated and drug-affected workers on building sites presents a real and serious risk to the safety of hard-working Victorians."

The drug testing issue was first raised in April 2011 when then-premier Ted Baillieu said he would consider random tests in response to concerns over links between criminal gangs and the building industry.

Since then police fears of bikies infiltrating construction sites have surfaced, as well as union corruption claims.